856049 has 4 divisors (see below), whose sum is σ = 858864. Its totient is φ = 853236.

The previous prime is 856043. The next prime is 856057. The reversal of 856049 is 940658.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 856049 - 2¹² = 851953 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (856043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 887 + ... + 1580.

It is an arithmetic number, because the mean of its divisors is an integer number (214716).

2⁸⁵⁶⁰⁴⁹ is an apocalyptic number.

It is an amenable number.

856049 is a deficient number, since it is larger than the sum of its proper divisors (2815).

856049 is a wasteful number, since it uses less digits than its factorization.

856049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2814.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 856049 is about 925.2291608029. The cubic root of 856049 is about 94.9509996611.

The spelling of 856049 in words is "eight hundred fifty-six thousand, forty-nine".